Our coffers can always use help, [%NAME]! There is no such thing as too much gold when trying to prosecute a war. We've noticed that many of these vermin are carrying quantities of Molten Gold Ingots. Bring them to me and I'll make sure you are compensated.
Thank you, [%NAME]. You are as generous as you are powerful!
I'll take 500 Molten Gold Ingots from you when you're ready.